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Control apparatus for exhaust gas recirculation valve

a control apparatus and valve body technology, applied in the direction of electrical control, process and machine control, instruments, etc., can solve the problem of inability to obtain good control accuracy in the small opening region of the large-sized exhaust gas recirculation valve, and achieve good controllability

Inactive Publication Date: 2005-07-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach improves control accuracy and controllability of the exhaust gas recirculation valve, even in the small opening region, by using a controlled object model and sliding mode control, thereby stabilizing the control and adapting to changes in dynamic characteristics and intake pressure.

Problems solved by technology

However, there is a problem described below when the exhaust gas recirculation valve is enlarged and the exhaust gas recirculation flow rate is controlled from a low flow rate to a high flow rate by only one large-size exhaust gas recirculation valve.
However, good control accuracy in the small opening region of the large-size exhaust gas recirculation valve cannot be obtained.

Method used

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  • Control apparatus for exhaust gas recirculation valve
  • Control apparatus for exhaust gas recirculation valve
  • Control apparatus for exhaust gas recirculation valve

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Embodiment Construction

[0043]Embodiments of the present invention will be hereinafter described with reference to the drawings.

[0044]FIG. 1 schematically shows a configuration of an internal combustion engine (which will be hereinafter referred to as “engine”) and a control system therefor according to an embodiment of the present invention. The engine illustrated represents a four-cylinder engine 1, for example, and it has an intake pipe 2 provided with a throttle valve 3. A throttle opening (TH) sensor 4 is connected to the throttle valve 3, so as to output an electrical signal corresponding to an opening angle of the throttle valve 3 and supply the electrical signal to an electronic control unit (which will be hereinafter referred to as “ECU”) 5.

[0045]Fuel injection valves 6, only one of which is shown, may be inserted into the intake pipe 2 at locations intermediate between the cylinder block of the engine 1 (i.e., slightly upstream of the respective intake valves (not shown)) and the throttle valve 3...

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PUM

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Abstract

A control apparatus for an exhaust gas recirculation valve is disclosed. The exhaust gas recirculation valve is provided in an exhaust gas recirculation pipe for recirculating exhaust gases from an internal combustion engine to an intake system of the engine. The exhaust gas recirculation valve controls an exhaust gas recirculation amount. An opening of the exhaust gas recirculation valve is controlled to a target opening, based on a controlled object model which is obtained by modeling the exhaust gas recirculation valve.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a control apparatus for an exhaust gas recirculation valve which is provided in an exhaust gas recirculation pipe for recirculating exhaust gases from an internal combustion engine to an intake system of the engine, and controls an exhaust gas recirculation amount.[0003]2. Description of the Related Art[0004]It is important for maintaining good exhaust characteristics to accurately and quickly control an opening of the exhaust gas recirculation valve which controls an exhaust gas recirculation amount of the internal combustion engine to a target opening. Therefore, Japanese Laid-open Patent Publication No. 2002-235606 shows a control apparatus in which an opening of the exhaust gas recirculation valve which is detected when the target opening is “0 (the fully-closed opening)” is learned as the fully-closed opening, the detected opening is corrected using the learned fully-closed opening,...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F02D21/00F02D41/14F02D41/00F02D21/08F02M25/07
CPCF02D41/0077F02D41/1403F02M25/0754F02D41/1402F02D41/1456F02D2041/1415F02D2041/1423F02D2041/1433F02D2200/0404F02D2200/0406F02D2200/0414F02D2200/503F02M25/0772F02M2025/0762Y02T10/47F02M26/47F02M26/53F02M2026/004Y02T10/40
Inventor ISHIGURO, TETSUYAAKAZAKI, SHUSUKEYASUI, YUJIMIZUNO, TAKAHIDE
Owner HONDA MOTOR CO LTD